Automatic service-cock



fie 06 2350]:

Patented Dec. 20,1881.

(ModeL) W. R. FREEMAN.

AUTOMATIG SERVICE COOK.

Wizzeaaads,

ATENT FFrcE.

WILLIAM R. FREEMAN, OF SAN ANTONIO, TEXAS.

AUTOMATIC SERVICE-COCK.

SPECIFICATION forming part of Letters Patent No. 251,035, dated December20, 1881. Application filed September 29, 1880. (Model) 10 all whom itmay concern Be it known that I, WILLIAM R. FREEMAN, of San Antonio, inthe county of Bexar and State of Texas, have invented a new and usefulImprovement in Automatic Service-(Jocks, of which the following is aspecification.

The object of my invention is to furnish an improved automatic valve toform the connection between the water'main or distributingpipe and theservice-pipe of a building for regulating the flow and pressure of waterin such service-pipe and preventing overpressure,aud yet so constructedthat it maybe operated by hand, when desired as, for instance, when itis needed to shut off the water from the main in order to repair orattach branches and fancets to the servicepipe.

The operation of the invention will be easily understood by thefollowing description, with reference to the accompanying drawings, in

p which Figure 1 represents a longitudinal vertical central section of aservice-cock constructed according to my present invention. Figs. 2, 3,4, and 5 are enlarged detail cross sections of the same, taken throughthe lines 00 .10, y y, z z, and o o, respectively.

Similar letters of reference indicate corresponding parts in the severalfigures.

The arrows indicate the direction of the water-cnrrent. I

A is the inlet-nipple or short pipe, by which the service-cock isconnected to the main pipe under ground, and B the end of theservicepipe connected to the outlet of the service-cock.

O is the valve-case, having a partition for a valve-seat, c, andotherwise constructed as the case of an ordinary check-valve, with theeX- ception that as the vaLve is arranged to close upward an opening isprovided in the bottom of the case for allowing the insertion of thevalve from the under side, and is then closed by a screw-plug, c.

D is the round vertical valve-stem, fitted to slide water-tight in astuffing-box, 0 so that its upper end may be accessible from theoutside. The upper end of the valve-stem D is threaded to receive andsupport under ordinary pressure a suitable threaded weight, E, as shownin'Fig. 1. The weight E has upon its upper surface a square nipple, e,or other suitable device or projection, by which it may be grasped witha wrench tram above ground and turned upon the stem 1), to act for thecombined purposes of weight and nut. The lower end of the valve-stem Dis tlhtedfprefera bly in the cruciform shape shown in the drawings, toform water-channels 61, extending on both sides of thevalve-seatpartition from beneath the valve toa suitabledistance abovethe same. The lower fluted portion of the stem D is gradually diminishedby a series of parallel rabnets, forming shoulders or stops at n 0 inthe periphery of the stem, and the valve proper consists of a series offlat valve-disks, F G H, of parallel surfaces and diminishing sizes, asshown in Fig. 1, which disks have circular central openings of propersizes to adapt them to slide upon the respective rabbeted portions ofthe stem, while leaving the channels d open, the thickness of the disksand length of the rabbeted portions being so proportioned that the diskF cannot fall far enough to catch with its upper surface below theshoulders it, nor the disk G far enough to get its upper surface belowthe shoulders 0. The disk F has perforations f, and the disk Gr smallerperforations g. The smallest disk H is countersunk in its lower surfaceto lit and act as valve against' the surface of the knob I asvalve-seat. The latter is screwed upon a threaded pin, d, projectingfrom the extreme lower end of the stem D, and prevents the disks fromfalling off the stem. The lower end of the threaded pin (1 may beriveted to prevent the knob I from unturning. Bythis construction, thevalve-openings, as well as channels (I, being gradually diminished withthe respective disks, it will be understood that when properlyproportioned the disks F G H will regulate the even flow of the water inthe service-pipe, an increased velocity causing one or more of them torise and proportionally decrease the area of valveopening. Combinedincreased pressure and velocity would gradually raise the valve untilits disks H G F would become closed together and to the valve-seat c,leaving access for the water only through the small areaof the channelsd in the central opening of the disk H. Under hydrostatic pressure onlythe valvedisks F G H will, of course, not act; but when suchpressureincreases sufficien tl y to endanger the service-pipe thevalve-stem D and weight E will rise high enough to entirely close thevalve by bringing all the disks F G H and knob I together, like onesolid valve closed against the seat 0. The weight E is, of course,

i, proportioned to the effect of pressure due to the area of thevalve-stem D, and to the maximum pressure allowed in the service-pipewith safety.

When it is desired to shut off the water from entering theservice-pipes, thisis eifected by simply applying a wrench to the nipplee and screwing down the weight E against the stuffing-box until the stem1), raised thereby, closes the valve. By unscrewing the weight E andpushing down the stem D the valve is again opened.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1 As a new article of manufacture, a serviceccck in which the valve isarranged to close in the direction of the supply-current against apartition, 0, forming a valveseat in the chest 6, and is counteracted byan exterior Weight, E, upon the valve stem D, said weight beingproportioned to the pressure atwhich the valve should close,substantially as hereinbetore set forth.

2. A service-cock in which the valve is composed of a series ofvalve-disks movable between offsets upon a weighted stem, and ar rangedto close in the direction of the supplycurrent, substantially ashereinbefore set forth.

3. The weighted valve-stem D, provided with channels (1 and shoulders atn o, in combination with the valve-disks F G H, movable upon the stem,and the cone-knob I, substantially as hereinbefore set forth.

4. In combination with the threaded outer end of the stem D of a valve,F G H, closing in direction of the supply-current, the threaded weightE, arranged to be operated by a wrench, for the double purpose ofweighting the valve and closing it, when desired, substantially as setforth.

WM. R. FREEMAN.

Witnesses:

A. W. ALMQVIS'I, JOHN M. STELLE.

